Lost My Temper Once Too Often

I've been trying so hard to be a good little one for my Dom, but sometimes it's just too much. The other day, I got really frustrated with him and snapped at him after he told me to clean the house. It was completely out of character for me. Now every time he tells me off or sets a rule, I'm thinking about how easily I could slip up again. It makes my heart ache because it's not who I am, I want to be obedient. But knowing that I have this weakness gnaws at me.